<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/index' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片区域 -->
        <el-card>
            <el-alert title="注意：只允许为第三级分类设置参数!" type="warning" :closable="false" show-icon>
            </el-alert>

            <!-- 选择商品的列表 -->
            <el-row class="cat_opt">
                <span>选中商品分类: </span>
                <!-- 分类的级联选中框 -->
                <el-cascader v-model="selectedCateKeys" :options="catalist" :props="cateProps" expandTrigger="hover"
                    @change="handleChange"></el-cascader>
            </el-row>
            <!-- tab 页签区域 -->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <!-- 添加动态参数的面板 -->
                <el-tab-pane label="动态参数" name="many">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">
                        添加参数
                    </el-button>
                    <!-- 动态属性表格 -->
                    <el-table :data="manyTableData" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i">{{ item }}</el-tag>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" icon="el-icon-edit" size="mini"
                                    @click="showEidtDialog(scope.row.attr_id)">编辑
                                </el-button>
                                <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                            </template>

                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                <!-- 添加的面板 -->
                <el-tab-pane label="静态属性" name="only">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">
                        添加属性
                    </el-button>
                    <!-- 静态属性表格 -->
                    <el-table :data="onlyTableData" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand"></el-table-column>
                        <!-- 索引列 -->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" icon="el-icon-edit" size="mini"
                                    @click="showEidtDialog(scope.row.attr_id)">编辑
                                </el-button>
                                <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                            </template>

                        </el-table-column>
                    </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>
        <!-- 添加属性对话框 -->
        <el-dialog :title="'添加' + titleText" :visible.sync="addDialogVisible" width="50%" @close="addDialogClose">
            <el-form :model="addForm" :rules="addFormrules" ref="addFormRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 添加修改参数的对话框 -->
        <el-dialog :title="'修改' + titleText" :visible.sync="editDialogVisible" width="50%" @close="editDialogClose">
            <el-form :model="editForm" :rules="editFormrules" ref="editFormRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>


    </div>
</template>

<script>
export default {
    data() {
        return {
            // 商品分类的数据
            catalist: [],
            // 级联选择框的配置对象
            cateProps: {
                value: "cat_id",
                label: "cat_name",
                children: "children",
            },
            // 级联选择框的双向绑定数组
            selectedCateKeys: [],
            // 被激活的页签的名字
            activeName: "many",
            // 动态属性的数组
            manyTableData: [],
            // 静态属性的数组
            onlyTableData: [],
            // 控制添加对话框的显示与隐藏
            addDialogVisible: false,
            // 添加参数的表单数据对象
            addForm: {
                attr_name: ''
            },
            // 控制修改对话框的显示与隐藏
            editDialogVisible: false,
            // 修改的表单数据对象
            editForm: {

            },
            // 修改的表单验证规则对象
            editFormrules: {
                attr_name: [
                    { required: true, message: '请输入参数名称', trigger: 'blur' },
                ]
            },
            // 添加表单的验证规则对象
            addFormrules: {
                attr_name: [
                    { required: true, message: '请输入参数名称', trigger: 'blur' },
                ]
            }

        };
    },

    created() {
        this.getCataList();
    },

    methods: {
        async getCataList() {
            const { data: res } = await this.$http.get("categories");
            if (res.meta.status !== 200) {
                return this.$message.error("获取商品分类失败!");
            }
            // 讲商品分类的数据保存到data中
            this.catalist = res.data;
            // console.log(this.catalist);
        },
        // 级联选择框变化回触发这个方法
        handleChange() {
            this.getParamsData();
        },
        // 获取参数的列表数据
        async getParamsData() {
            // console.log(this.selectedCateKeys);
            // 证明选中的不是三级分类
            if (this.selectedCateKeys.length !== 3) {
                this.selectedCateKeys = [];
                this.manyTableData = []
                this.onlyTableData = []
                return;
            }
            // 证明选中是三级分类
            console.log(this.selectedCateKeys);
            // 根据所选分类的id和当前所处的面板获取对应的参数
            const { data: res } = await this.$http.get(`categories/${this.catrID}/attributes`, {
                params: { sel: this.activeName }
            })
            if (res.meta.status !== 200) {
                return this.$message.error('获取参数列表失败')
            }

            res.data.forEach(item => {
                item.attr_vals = item.attr_vals.split(' ')
            })
            console.log(res.data);
            if (this.activeName === 'many') {
                this.manyTableData = res.data
            }
            this.onlyTableData = res.data
        },

        // tab页签点击事件的处理函数
        handleTabClick() {
            console.log(this.activeName);
            this.getParamsData();
        },
        // 监听添加对话框的关闭事件
        addDialogClose() {
            this.$refs.addFormRef.resetFields()
        },
        // 点击按钮，添加参数
        addParams() {
            this.$refs.addFormRef.validate(async vaild => {
                if (!vaild) return
                const { data: res } = await this.$http.post(`categories/${this.catrID}/attributes`, { attr_name: this.addForm.attr_name, attr_sel: this.activeName })
                if (res.meta.status !== 201) {
                    return this.$message.error('添加参数失败')
                }
                this.$message.success('添加参数成功')
                this.addDialogVisible = false
                this.getParamsData()
            })
        },
        // 点击按钮展示修改对话框

        async showEidtDialog(attr_id) {
            const { data: res } = await this.$http.get(`categories/${this.catrID}/attributes/${attr_id}`,
                { params: { attr_sel: this.activeName } })
            console.log(res)
            if (res.meta.status !== 200) {


                return this.$message.error('获取参数信息')
            }
            this.editForm = res.data
            this.editDialogVisible = true
        },
        // 重置修改的表单
        editDialogClose() {
            this.$refs.editFormRef.resetFields()
        },
        // 点击按钮修改参数信息
        editParams() {
            this.$refs.editFormRef.validate(async vaild => {
                if (!vaild) return
                const { data: res } = await this.$http.put(`categories/${this.catrID}/attributes/${this.editForm.attr_id}`, { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
                if (res.meta.status !== 200) {
                    return this.$message.error('修改参数失败')
                }
                this.$message.success('修改参数成功')
                this.getParamsData();
                this.editDialogVisible = false

            })
        }

    },

    computed: {
        // 如果按钮需要被禁用则返回true,否则返回false
        isBtnDisabled() {
            if (this.selectedCateKeys.length !== 3) {
                return true;
            }
            return false;
        },
        // 当前选中的三级id
        catrID() {
            if (this.selectedCateKeys.length == 3) {
                return this.selectedCateKeys[2];
            }
            return null;
        },
        // 动态计算标题的文本
        titleText() {
            if (this.activeName === 'many') {
                return '动态属性'
            }
            return '静态属性'
        }
    },
};
</script>

<style lang="less" scoped>
.cat_opt {
    margin: 15px 0;
}
</style>